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(.module:
[lux (#- Type)
[abstract
["." monad (#+ do)]]
[control
["ex" exception (#+ exception:)]]
[data
[text
format]
[collection
["." list]]]
[target
[jvm
["$t" type (#+ Type)]]]
[tool
[compiler
[synthesis (#+ Synthesis)]
["." phase]]]]
[luxc
[lang
[host
[jvm (#+ Inst Operation Phase)
["_" inst]]]]]
["." //])
(exception: #export (not-a-tuple {size Nat})
(ex.report ["Expected size" ">= 2"]
["Actual size" (%n size)]))
(def: $Object ($t.class "java.lang.Object" (list)))
(def: #export (tuple generate members)
(-> Phase (List Synthesis) (Operation Inst))
(do phase.monad
[#let [size (list.size members)]
_ (phase.assert not-a-tuple size
(n/>= 2 size))
membersI (|> members
list.enumerate
(monad.map @ (function (_ [idx member])
(do @
[memberI (generate member)]
(wrap (|>> _.DUP
(_.int (.int idx))
memberI
_.AASTORE)))))
(:: @ map _.fuse))]
(wrap (|>> (_.int (.int size))
(_.array $Object)
membersI))))
(def: (flagI right?)
(-> Bit Inst)
(if right?
(_.string "")
_.NULL))
(def: #export (variant generate lefts right? member)
(-> Phase Nat Bit Synthesis (Operation Inst))
(do phase.monad
[memberI (generate member)]
(wrap (|>> (_.int (.int (if right?
(.inc lefts)
lefts)))
(flagI right?)
memberI
(_.INVOKESTATIC //.runtime-class
"variant_make"
($t.method (list $t.int $Object $Object)
(#.Some ($t.array 1 $Object))
(list))
#0)))))
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